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Access network design for branch, remote, outdoor, and campus locations with HPE Aruba Networking access points and mobility controllers.
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Is dynamic server selection only for when termination enabled?

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  • 1.  Is dynamic server selection only for when termination enabled?

    EMPLOYEE
    Posted Sep 25, 2013 01:38 PM

    I basically have two radius server configured for a particular server-group.  Termination not enabled.

     

    Problem is, particular handheld devices only are successful if they use the backup server.  Every other devices is fine against the primary radius.

     

    And yes, I know the server guys need to fix it, but I'm trying to see what my options are.

     

    Thanks



  • 2.  RE: Is dynamic server selection only for when termination enabled?

    EMPLOYEE
    Posted Sep 25, 2013 01:40 PM

    Do you have "fail through" ticked off?  If yes,this will send the auth to the second server IF the primary server sends a reject message.



  • 3.  RE: Is dynamic server selection only for when termination enabled?

    EMPLOYEE
    Posted Sep 25, 2013 01:42 PM

    but that is only if termination is enable on the controller?  Is that right



  • 4.  RE: Is dynamic server selection only for when termination enabled?

    EMPLOYEE
    Posted Sep 25, 2013 01:48 PM

    According to the user guide, yes.  Have you looked at the following:

     

    The controller can dynamically select an authentication server from a server group based on the user information sent by the client in an authentication request.

     

    For example, an authentication request can include client or user information in one of the following formats:

     

    l <domain>\<user>—forexample,corpnet.com\darwin

    l <user>@<domain>—forexample,darwin@corpnet.com

    l host/<pc-name>.<domain>—forexample,host/darwin-g.finance.corpnet.com(thisformatisusedwith802.1x machine authentication in Windows environments)

     

    When you configure a server in a server group, you can optionally associate the server with one or more match rules. A match rule for a server can be one of the following:

     

    l Theserverisselectediftheclient/userinformationcontainsaspecifiedstring.

    l Theserverisselectediftheclient/userinformationbeginswithaspecifiedstring.

    l Theserverisselectediftheclient/userinformationexactlymatchesaspecifiedstring.



  • 5.  RE: Is dynamic server selection only for when termination enabled?

    EMPLOYEE
    Posted Sep 25, 2013 01:58 PM

    Trying to do that, but doesn't seem to work.  Here is the server-group

     

    Brasil server-group.jpg

     

    but here is the auth-tracebuf

     

    Sep 25 14:52:30  eap-id-req            <-  00:23:68:cd:4a:86  24:de:c6:dc:dd:32               1   5
    Sep 25 14:52:30  eap-id-resp           ->  00:23:68:cd:4a:86  24:de:c6:dc:dd:32               1   25   <user>@CORP
    Sep 25 14:52:30  rad-req               ->  00:23:68:cd:4a:86  24:de:c6:dc:dd:32               18  262
    Sep 25 14:52:30  rad-resp              <-  00:23:68:cd:4a:86  24:de:c6:dc:dd:32/primary01  18  90
    Sep 25 14:52:30  eap-req               <-  00:23:68:cd:4a:86  24:de:c6:dc:dd:32               2   6
    Sep 25 14:52:30  eap-nak               ->  00:23:68:cd:4a:86  24:de:c6:dc:dd:32               2   6
    Sep 25 14:52:30  rad-req               ->  00:23:68:cd:4a:86  24:de:c6:dc:dd:32/primary01  27  281
    Sep 25 14:52:30  rad-reject            <-  00:23:68:cd:4a:86  24:de:c6:dc:dd:32/primary01  27  56
    Sep 25 14:52:30  eap-failure           <-  00:23:68:cd:4a:86  24:de:c6:dc:dd:32               2   4    server rejected

     

    To me, that shows it not working.  I tried with the match-authstring as well with the username, but it didn't choose the second server.

     

    :smileysad:

     



  • 6.  RE: Is dynamic server selection only for when termination enabled?

    EMPLOYEE
    Posted Sep 27, 2013 03:41 PM

    I had a look at this with TAC and it just doesn't seem to work as it should, and is looking like a bug.  AOS 6.2.1.3.

     

    In spite of this I was wondering what happens in the example above if the first server becomes unavailable?  If there is only one server available are the match rules ignored then and all clients just use that as normal?